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Product InformationFeatures
(1) The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second). Description
The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic input and output buffer separated by TI's silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, and prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received every 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state. The small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (dc) to 150 Mbps.(1) The A-, B- and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS VCC/2 input thresholds and do not have the input noise-filter and the additional propagation delay. These devices require two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS. These devices are characterized for operation over the ambient temperature range of -40°C to 125°C. |
| Price | Packaging | Samples | |||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Samples |
| ISO7221BD | ACTIVE | -40 to 125 | 1.35 | 1ku | SOIC (D) | 8 | View | 75 | TUBE | |
| ISO7221BDG4 | ACTIVE | -40 to 125 | 1.35 | 1ku | SOIC (D) | 8 | View | 75 | TUBE | |
| ISO7221BDR | ACTIVE | -40 to 125 | 1.20 | 1ku | SOIC (D) | 8 | View | 2500 | LARGE T&R | Purchase Samples |
| ISO7221BDRG4 | ACTIVE | -40 to 125 | 1.20 | 1ku | SOIC (D) | 8 | View | 2500 | LARGE T&R | Purchase Samples |
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| TI Inventory Status | Reported Distributor Inventory | |||||
| ISO7221BD | As of 11:25 AM GMT, 03 Jul 2009 | As of 11:25 AM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 20 Weeks | Americas | Mouser Electronics | 276 | |||
| Newark | 145 | |||||
| Europe | Avnet-SILICA | 75 | ||||
| ISO7221BDG4 | As of 11:25 AM GMT, 03 Jul 2009 | As of 11:25 AM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 20 Weeks | None Reported View Distributors | |||||
| ISO7221BDR | As of 11:25 AM GMT, 03 Jul 2009 | As of 11:25 AM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 20 Weeks | None Reported View Distributors | |||||
| ISO7221BDRG4 | As of 11:25 AM GMT, 03 Jul 2009 | As of 11:25 AM GMT, 03 Jul 2009 | ||||
| Lead Time | Region | Company | In Stock | Purchase | ||
| 20 Weeks | None Reported View Distributors | |||||
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
| ISO7221BD | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| ISO7221BDG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| ISO7221BDR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| ISO7221BDRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
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Most useful technical documents for ISO7221B 
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